For natural selection to occur, what must be present in a population?
a. genetic drift
b. gene flow
c. decent with modification
d. variation
d. variation
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The process of evolutionary changes that result in formation of new species and groups of species is called
A. temporal evolution. B. artificial selection. C. macroevolution. D. serial evolution. E. a combination of temporal and serial evolution.
A disease-causing microorganism or virus is referred to as a(n)
A. avirulent infection. B. colony. C. commensal. D. pathogen.
Which of the below is not one of the four general types of data when conducting an epidemiological study?
a. nominal b. ordinal c. discrete d. discontinuous
Which component distributes water and nutrients throughout the plant body?
a. ground tissue
b. vascular tissue
c. dermal tissue
d. root
e. shoot